Convergence of the variable two-step BDF time discretisation of nonlinear evolution problems governed by a monotone potential operator |
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Authors: | Etienne Emmrich |
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Affiliation: | 1.Technische Universit?t Berlin,Institut für Mathematik,Berlin,Germany |
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Abstract: | The initial-value problem for a first-order evolution equation is discretised in time by means of the two-step backward differentiation formula (BDF) on a variable time grid. The evolution equation is governed by a monotone and coercive potential operator. On a suitable sequence of time grids, the piecewise constant interpolation and a piecewise linear prolongation of the time discrete solution are shown to converge towards the weak solution if the ratios of adjacent step sizes are close to 1 and do not vary too much. |
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Keywords: | Nonlinear evolution problem Monotone potential operator Time discretisation Linear multistep method Backward differentiation formula Non-uniform time grid Convergence |
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